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6 changes: 5 additions & 1 deletion prometheus_client/metrics.py
Original file line number Diff line number Diff line change
Expand Up @@ -14,6 +14,10 @@

if sys.version_info > (3,):
unicode = str
create_bound_method = types.MethodType
else:
def create_bound_method(func, obj):
return types.MethodType(func, obj, obj.__class__)


def _build_full_name(metric_type, name, namespace, subsystem, unit):
Expand Down Expand Up @@ -369,7 +373,7 @@ def set_function(self, f):
def samples(self):
return (('', {}, float(f())),)

self._child_samples = types.MethodType(samples, self)
self._child_samples = create_bound_method(samples, self)

def _child_samples(self):
return (('', {}, self._value.get()),)
Expand Down